Effect of disorder on charge-density wave and superconducting order in the half-filled attractive Hubbard model
C. Huscroft, R. T. Scalettar
DOI 10.1103/PhysRevB.55.1185 · Physical Review B
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
The half-filled attractive Hubbard model exhibits a simultaneous charge-density wave and superconducting order in its ground state. In this paper we use approximation-free quantum Monte Carlo techniques to explore the effect of disorder in the site energies on this degeneracy. We find that superconducting order survives randomness out to a critical amount of disorder, but charge ordering is immediately destroyed. This settles the issue as to whether disordered site energies, which do not break time-reversal invariance, can destroy pairing correlations. We also locate the precise ratio of disorder to bandwidth required for the disorder-driven transition from the superconducting state. We explore the validity of a strong-coupling picture which maps the system onto a Heisenberg model in a random magnetic field.
Similar papers
Quantum Monte Carlo Study of the Disordered Attractive Hubbard Model
similarity 0.92R. T. Scalettar et al. · 1998 · arXiv:cond-mat/9807008
Source status unknown — claims are unverified
Intertwined spin, charge and pair correlations in the two-dimensional Hubbard model in the thermodynamic limit
similarity 0.91Peizhi Mai et al. · 2021 · arXiv:2106.01944
Source status unknown — claims are unverified
Doping dependence of antiferromagnetic correlations in high-temperature superconductors
similarity 0.90M. Inui et al.
Source status unknown — claims are unverified
Superconductivity in correlated wave functions
similarity 0.90Claudius Gros
Source status unknown — claims are unverified
Dynamic Cluster Quantum Monte Carlo Simulations of a Two-Dimensional Hubbard Model with Stripelike Charge-Density-Wave Modulations: Interplay between Inhomogeneities and the Superconducting State
similarity 0.90T. A. Maier et al.
Source status unknown — claims are unverified
Disorder and robustness of superconductivity on the quasi-one-dimensional flat-band Creutz lattice
similarity 0.90Si Min Chan et al.
Source status unknown — claims are unverified